@article{2186,
  author = {D. Burlon and G. Ghirlanda and G. Ghisellini and D. Lazzati and L. Nava and M. Nardini and A. Celotti},
  title = {Precursors in Swift Gamma Ray Bursts with Redshift},
  year = {2008},
  journal = {The Astrophysical Journal},
  volume = {685},
  pages = {L19 - L22},
  month = {Aug-09-2009},
  issn = {0004-637X},
  url = {http://stacks.iop.org/1538-4357/685/i=1/a=L19},
  doi = {10.1086/592350},
}